ResearchRouting table, RPKI, IRR & looking glass

AS42427 Mimecast Services Limited

AS42427 (MIMECAST-UK) is registered to Mimecast Services Limited in GB. It originates 13 prefixes in the global routing table.

11
IPv4 prefixes
2
IPv6 prefixes
2,816
IPv4 addresses
76%
RPKI valid

Who holds AS42427

Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.

AS number
AS42427
Handle
MIMECAST-UK
Organization
Mimecast Services Limited
Country
GB
ASPA
None published

What AS42427 announces

Prefixes originated by AS42427 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
11
IPv6 prefixes
2
IPv4 addresses
2,816 (11 /24s)
RPKI valid
10 76%
RPKI invalid
0
RPKI not found
3
ROAs naming AS42427
15
With an IRR route object
13 100%

Announced prefixes

Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.

Who AS42427 is reached through

The AS just before AS42427 in the paths our looking glass collectors hold, for 13 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.

Routing registry objects

From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.

Sourceas-nameMaintained by
RIPEMIMECAST-UKRIPE-NCC-END-MNT, MCSL-RIPE-MNT

Route objects with origin AS42427: RADB 20 · RIPE 15 · ARIN 2

as-sets that list AS42427 (6)